Firsoff V A <br/><br/>
Exploring the planets 

 -  1964 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>25890 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Solar System<br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B94, K4-;1